You can post links here, although you have to have posted a set number of times before you can. I've heard a lot of those arguments, too, and I still have no idea about whodunnit.
From what I've heard on another forum, there's a couple of suspects that aren't on your list, but I don't know how valid they are, or how feasible.
Will we find out in the next book, I wonder? Or will it be one of RJ's unsolved mysteries? (to everyone else, aside from himself, I mean)
Seems like there's so mamy theories out there!